Xmind is the name of the software I introduced in class today. You can search the name Xmind in any search engine, or you can go to http://www.xmind.net to register and download the free version of the software. Registration is not compulsory as you can download it from http://sourceforge.net/ as well. But registration gives you the ability to upload you mindmaps and possibly enabling collaborative work later.
Have fun!
Have fun!